Emergency door-lock.



J. B. BERSTLER.

EMERGENCY DOOR LOCK.

APPLICATION FILED IBILG. 1912. RENEWED SEPT. 7. 1912.

1,058,346. Patented Apr. 8, 1913.

2 SHEETS-SHEET l.

703/111, ,5. B5 5 7155 fluvwtoz l/Witnesses J. B. BERSTLER.

EMERGENCY DOOR LOCK.

RENEWED SEPT. 7, 1912.

APPLICATION TILED FEB-.6, 1912. 1,058,346.

Patented Apr. 8, 1913.

2 SHEETS-SHEET 2.

5 M van tor l ED STATES PATENT OFFICE.

JOSHUA B. IBERSTLEB, OF LANCASTER PENNSYLVANIA, 'ASSIGNOR, BY MESNEASSIGNMENTS, T0 SAFETY MANUFACTURING COMPANY, OF LANCASTER,PENNSYLVANIA, A CORPORATION OF DELAWARE.

EMERGENCY DOOR-LOCK. v

Patented Apr. 8, 1913.

Application filed February 6, 1912, Serial No. 675,700. RenewedSeptember 7, 1912. Serial No. 719,163.

To all whom it may concern:

Be it known that I, JOSHUA B. BERSTLER, citizen of the United States,residing at Lancaster, in the county of Lancaster and State ofPennsylvania, have invented certain new and vuseful Improvements inEmergency Door-Locks, of which the following is aspecification.

This invent-ion relates to improvements in emergency door locks and theobject is to provide a device of this class in which the lock may beoperated by pressure from the inside and by turning the lock knob fromthe outside.

The principal object in the present instance is to produce a device ofthis character that will be as simple as possible, and yet proveefiective in action.

The invent-ion consists of a front plate, with a knob so placed thereinthat it will be free to move toward and away from the door, by pressurebeing applied directly to it, and a pair of levers so placed within theplate that the inner edge of the knob will operate them to withdraw theupper and lower door locking bolts simultaneously.

A further object is to provide a simple meansfor operating both of thelocking bolts from the outside by merely turning the outside knob.

The invention is more fully described in the following specification andclearly illustrated in, the accompanying drawings in which Figure 1 isan elevation of a pair of doors with my lock applied thereto, showingthe inside of the doors. Fig. 2 is a central, vertical sectional view ofthe device as applied to the door. Fig. 3 is a detail view showing theoutside knob operating means foroperating the bolts. Fig. 4 is a detailof the bolt. Fig. 5 is a detail of the bolt engaging end of theoperating rod. Fig. 6 is a detail of the bolt guide and Fig. 7 is adetail of the lever supporting plate.

The numeral 1 designates the door, 2 the inner plate and 3 the innerknob. The plate 2 is formed with an inwardly curved hollow portion 4,the inner extremity of which is formed with a cylindrical neck 5 andthis neck is formed with a horizontal guide slot 6..

The knob 3 fits loosely in this neck, and

its shank 7 is provided with a to ride in the,slot 6.

In the'curved hollow portion of the plate I secure a lever supportingplate 9, formed with a pair of side ears 10 and in these ears I place apair of oppositely movable levers 11, the inner or free ends of whichare in line with the inner end of the knob shank, and to the oppositeends of these levers I secure the innerends of a pair of bolt operatingrods 12. Each of these rods is formed at its' other end with a hook 13adapted to engage an opening 14 in one of pin 8 adapted 'the lockingbolts 15, one of which bolts is plates serve to keep the bolts in properposition. These plates are formed with elongated slots in the frontface, 18," and a pin 19 which screws into the bolt moves in this slotand serves to keep the bolt in proper position, and together with twolugs 20 formed on the plate serves as a means for keeping the bolt inalinement. The bolts are backed by coiled springs 21, which serve tokeep them normally shot and against the tension of which the boltoperating rods 12 and the levers 11 operate. It is evident thereforethat when pressure is the levers are opened an the operating rods 12 aredrawn inwardly, toward the knob center, thus withdrawing the bolts 15and permitting the door to be opened.

The means for opening the door from theoutside consist of a knob 22, onthe inner end of the shank 23 of whichI place a disk 24 and on this diskll place two headed pins 25 near the outer edge, diametrically oppositeeach other. On the inner ends of the operating rods 12, I attach plates26, each of which is formed with an elongated slot 27 and in these slotsI arrange a pair of headed rods 28, adapted to move therein, and whoseinner ends are pivotally secured to the headed pins on the disk. It willbe seen. therefore, that when the knob 22 is turned, the rods 28willdraw the operating rods 12 toward the lock center and retract thelocking bolts.

The. slots 27 in the plates 25 will permit the plates to move when theinner knob is ut on the knob 3,

operated without turning or afl'ecting the outer knob, just as the outerknob when turned Will not affect the inner knob, for the reason that theinner ends of the levers ll are normally free from contact with theinner edge of the inner knob shank.

Having thus fully described my invention What I claim and desire tosecure Letters Patent is 1. In an emergency door lock the combination ofan inner plate provided with a central neck, a guide slot in said neck,a hollow inner knob provided with a pin adapted to move in said neck, a"lever supporting platesecured within the plate, a pair of leverspivotally arranged on said plate and adapted to be operated b the saidknob, a

air of bolt operating r0 s connected to the inner ends of the levers,hooks on the outer ends of said rods, bolts formed with openings ada tedto receive said hooks, SPI'IHOS forkee mg the bolts normally shot, gui eplates or the bolts, pins on the bolts pro- ]ecting through slots in theguide plates, plates provided with slots secured to the inner ends ofthe operating rods, headed rods adapted to move in said slots, an outerknob, a disk on" the inner end of said knob and pins' on the disk inpivotal engagement with the irmer ends of said headed rods.

2. In an emergency door lock the combination of a plate formed with acentral opening, a knob movably secured in said opening, a pair oflevers secured within the plate and in line with the shank of said knob,operating rods connected to said levers, locking bolts on the outer endsof said operating rods, springs to keep the bolts normally shot guideplates for the bolts, an outer knob, a disk secured to the knob, androds connecting the disk with the operating rods.

3. In an emergency door lock the combination of an inner knob, a plateformed with an opening to receive the shank of the knob, a pair of boltoperating levers pivoted within the" plate, the free ends of which areadapted to be actuated by the knob shank, bolt operating rods connectedto the inner ends of the levers, spring backed bolts on the outer endsof the operating rods, guide plates for the bolts, an outer knob, a diskon the shank of the outer knob and rods connecting the disk with thebolt operating rods.

In testimony whereof I afiix my signature in presence of two witnesses.

JOSHUA B. BERSTLER.

Witnesses:

En. A. KELLY, CLARA E. YoUNe.

